University of Minnesota

Displaying 81-119 of 119 results

  • White Papers // Dec 2009

    A Bluetooth Keyboard Attack

    Bluetooth devices have become increasingly popular and are expected to surpass two billion devices sold by 2010. Bluetooth provides communication between devices, such as cell phones and headsets, or computers and robots, among other things. Bluetooth keyboards and mice are also very popular, making people more mobile when working at...

    Provided By University of Minnesota

  • White Papers // Dec 2009

    S-MED: Sarcoma MicroRNA Expression Database

    Human sarcomas are a heterogeneous group of over 50 different malignant tumors for which very few diagnostic markers currently exist. MicroRNA (miRNA) transcript levels have been proposed for use in the diagnosis, classification and prognosis of tumors. Over 700 miRNAs are identified in humans and miRNA are considered attractive candidates...

    Provided By University of Minnesota

  • White Papers // Dec 2009

    Examining Return On Human Capital Investments In The Context Of Offshore IT Workers

    The rapid pace of technological innovation necessitates Information Technology (IT) services firms to continually invest in replenishing the skills of their key asset base, the human capital. Controlling for unobservable employee characteristics and possible selection bias, one find significant a positive impact of training on employee performance. An additional training...

    Provided By University of Minnesota

  • White Papers // Dec 2009

    Starling: Minimizing Communication Overhead in Virtualized Computing Platforms Using Decentralized Affinity-Aware Migration

    Virtualization is being widely used in large-scale computing environments, such as clouds, data centers, and grids, to provide application portability and facilitate resource multiplexing while retaining application isolation. In many existing virtualized platforms, it has been found that the network bandwidth often becomes the bottleneck resource, causing both high network...

    Provided By University of Minnesota

  • White Papers // Dec 2009

    Global Budgets And Excess Demand For Hospital Care

    Excess demand is a pervasive feature of health care systems that use global budgets to pay for hospital care, regardless of the amount of money spent by those systems. This paper presents a theory that explains this feature of global budgets. The theory emphasizes that hospital administrators control the allocation...

    Provided By University of Minnesota

  • White Papers // Nov 2009

    Flexible Decision Support in Dynamic Inter-organizational Networks

    An effective Decision Support System (DSS) should help its users improve decision-making in complex, information-rich, dynamic environments. The authors present a feature gap analysis of current decision support technologies, and they identify a set of DSS Desiderata, properties that can contribute both effectiveness and flexibility to users in such environments....

    Provided By University of Minnesota

  • White Papers // Oct 2009

    The Economic Impact of Wireless Number Portability

    This paper examines the price response of wireless carriers to the introduction of number portability. The authors find that wireless prices decreased in response to number portability, but not uniformly across plans. Average prices for the plans with the fewest minutes decreased by only $0.19/month (0.97%), but average prices for...

    Provided By University of Minnesota

  • White Papers // Oct 2009

    Virtual Scanning Algorithm for Road Network Surveillance

    This paper proposes a VIrtual Scanning Algorithm (VISA), tailored and optimized for road network surveillance. The authors' design uniquely leverages upon the facts that the movement of targets (e.g., vehicles) is confined within roadways and the road network maps are normally known. They guarantee the detection of moving targets before...

    Provided By University of Minnesota

  • White Papers // Sep 2009

    3D Reconstruction of Periodic Motion From a Single View

    Periodicity has been recognized as an important cue for tasks like activity recognition and gait analysis. However, most existing techniques analyze periodic motions only in image coordinates, making them very dependent on the viewing angle. In this paper, the authors show that it is possible to reconstruct a periodic trajectory...

    Provided By University of Minnesota

  • White Papers // Sep 2009

    Joint Transmitter and Receiver Carrier Sensing Capability of CSMA in MANETs

    This paper considers the performance of the CSMA protocol with joint transmitter-receiver sensing in a wireless mobile ad hoc network. In the authors' network model, packets belonging to specific transmitters arrive randomly in space and time according to a 3-D Poisson point process, and are then transmitted to their intended...

    Provided By University of Minnesota

  • White Papers // Sep 2009

    Cash Flow Risk Ratio: An Aid To Marketing Decisions

    Financial risk differs from the business risks previously described in that it results from the way the firm's capital is obtained and financed. A producer may be subject to fluctuations in interest rates on borrowed capital, or face cash flow difficulties if there are insufficient funds to repay creditors. The...

    Provided By University of Minnesota

  • White Papers // Sep 2009

    A Multi-Robot System for Unconfined Video-Conferencing

    Telepresence or tele-immersion technologies allow people to attend a shared meeting without being physically present in the same location. Commercial telepresence solutions available in the market today have significant drawbacks - they are very expensive, and confine people to the area covered by stationary cameras. This paper presents a mobile...

    Provided By University of Minnesota

  • White Papers // Sep 2009

    Multi-Type Nearest Neighbor Queries Road Networks With Time Window Constraints

    A Multi-Type Nearest Neighbor (MTNN) query finds the shortest tour for a given query point and different types of spatial features such that only one instance of each feature is visited during the tour. In a real life MTNN query a user normally needs an answer with specific start time...

    Provided By University of Minnesota

  • White Papers // Sep 2009

    ESC: Energy Synchronized Communication in Sustainable Sensor Networks

    With advances in energy harvesting techniques, it is now feasible to build Sustainable Sensor Networks (SSN) to support long-term applications. Unlike battery-powered sensor networks, the objective of sustainable sensor networks is to effectively utilize a continuous stream of ambient energy. Instead of pushing the limits of energy conservation, the authors...

    Provided By University of Minnesota

  • White Papers // Sep 2009

    Spatiotemporal Delay Control for Low-Duty-Cycle Sensor Networks

    Data delivery is a major function of sensor network applications. Many applications, such as military surveillance, require the detection of interested events to be reported to a command center within a specified time frame, and therefore impose a real-time bound on communication delay. On the other hand, to conserve energy,...

    Provided By University of Minnesota

  • White Papers // Sep 2009

    Mendel Versus Malthus: Research, Productivity And Food Prices In The Long Run

    Over the past 50 years and longer, the supply of food commodities has grown faster than the effective market demand, in spite of increasing population and per capita incomes. Consequently, the real (deflated) prices of food commodities have steadily trended down. The past increases in agricultural productivity and production, and...

    Provided By University of Minnesota

  • White Papers // Sep 2009

    Anomaly Detection : A Survey

    "Anomaly detection is an important problem that has been researched within diverse research areas and application domains. Many anomaly detection techniques have been specifically developed for certain application domains, while others are more generic. This survey tries to provide a structured and comprehensive overview of the research on anomaly detection....

    Provided By University of Minnesota

  • White Papers // Aug 2009

    Extracting the Textual and Temporal Structure of Supercomputing Logs

    Supercomputers are prone to frequent faults that adversely affect their performance, reliability and functionality. System logs collected on these systems are a valuable resource of information about their operational status and health. However, their massive size, complexity, and lack of standard format makes it difficult to automatically extract information that...

    Provided By University of Minnesota

  • White Papers // Aug 2009

    An Examination Of Quality Management In Support Functions Of Elementary And Secondary Education Using The Malcolm Baldrige National Quality Awards Criteria For Performance Excellence

    Student learning, the primary outcome of the education process, is another important measure of quality. Learning among elementary and secondary students is monitored at the national level through the achievement test known as the National Assessment of Educational Progress. Trend data suggests that achievement growth among students has stagnated despite...

    Provided By University of Minnesota

  • White Papers // Jul 2009

    Interaction, Competition and Innovation in a Service-Oriented Internet: An Economic Model

    This paper presents a new economic approach for studying competition and innovation in a complex and highly interactive system of network providers, users, and suppliers of digital goods and services (i.e., service providers). It employs Cournot and Bertrand games to model the competition among service providers and among network providers,...

    Provided By University of Minnesota

  • White Papers // Jul 2009

    IP-Geolocation Mapping for Involving Moderately-Connected Internet Regions

    Current IP-geolocation mapping schemes primarily take delay-measurement approach, and most of them are based on the assumption of a strong correlation between networking delay and geographical distance between the targeted client and the landmarks. In this paper, however, the authors investigate a large region of the Internet and find the...

    Provided By University of Minnesota

  • White Papers // Jul 2009

    Retail And Wholesale Market Power In Organic Foods

    The demand for organic fresh fruits and vegetable continues to grow at a rate far higher than the rest of the produce industry. The cost of meeting organic certification standards, however, has meant that supply has been slow to adjust. With limited supply, the authors hypothesize that organic suppliers enjoy...

    Provided By University of Minnesota

  • White Papers // Jul 2009

    Multi-User Diversity Vs. Accurate Channel State Information in MIMO Downlink Channels

    In a multiple transmit antenna, single antenna per receiver downlink channel with limited channel state feedback, the authors consider the following question: given a constraint on the total system-wide feedback load, is it preferable to get low-rate/coarse channel feedback from a large number of receivers or high-rate/high-quality feedback from a...

    Provided By University of Minnesota

  • White Papers // Jun 2009

    HiDRA: Statistical Multi-Dimensional Resource Discovery for Large-Scale Systems

    Resource discovery enables applications deployed in heterogeneous large-scale distributed systems to find resources that meet QoS requirements. In particular, most applications need resource requirements to be satisfied simultaneously for multiple resources (such as CPU, memory and network bandwidth). Due to dynamism in many large-scale systems, providing statistical guarantees on such...

    Provided By University of Minnesota

  • White Papers // May 2009

    Exploring In-Situ Sensing Irregularity in Wireless Sensor Networks

    The circular sensing model has been widely used to estimate performance of sensing applications in existing analyses and simulations. While this model provides valuable high-level guidelines, the quantitative results obtained may not reflect the true performance of these applications, due to the sensing irregularity introduced by existence of obstacles in...

    Provided By University of Minnesota

  • White Papers // May 2009

    Using Proxies to Accelerate Cloud Applications

    A rich cloud ecosystem is unfolding with clouds emerging to provide platforms and services of many shapes and sizes. The authors speculate that future network applications may wish to utilize and synthesize capabilities from multiple clouds. The problem is this may entail significant data communication that derives from the client-server...

    Provided By University of Minnesota

  • White Papers // May 2009

    Nebulas: Using Distributed Voluntary Resources to Build Clouds

    Current cloud services are deployed on well provisioned and centrally controlled infrastructures. However, there are several classes of services for which the current cloud model may not fit well: some do not need strong performance guarantees, the pricing may be too expensive for some, and some may be constrained by...

    Provided By University of Minnesota

  • White Papers // May 2009

    Virtual Putty: Reshaping the Physical Footprint of Virtual Machines

    Virtualization is a key technology underlying cloud computing platforms, where applications encapsulated within virtual machines are dynamically mapped onto a pool of physical servers. In this paper, the authors argue that cloud providers can significantly lower operational costs, and improve hosted application performance, by accounting for affinities and conflicts between...

    Provided By University of Minnesota

  • White Papers // May 2009

    How Important Is The New Goods Margin In International Trade?

    The authors propose a methodology for studying changes in bilateral trade due to countries exporting goods that they did not export previously, or exported only in small quantities. Applying this methodology to countries pairs that undergo trade liberalization and to pairs where one of the countries undergoes significant structural transformation,...

    Provided By University of Minnesota

  • White Papers // Apr 2009

    Effects of Generic Types Specialization on Program Behavior

    Generic types are a language feature of Java that allows writing program code that is parameterized over types. The Java implementation of generic types uses a mechanism called type erasure. Type erasure creates a single instance of a generic class, removing all type specific usage information (e.g. whether it is...

    Provided By University of Minnesota

  • White Papers // Apr 2009

    Use of Profilers for Studying Java Dynamic Optimizations

    Java differs from many common programming languages in that Java programs are first compiled to platform-independent bytecode. Java bytecode is run by a program called the Java Virtual Machine (JVM). Because of this approach, Java programs are often optimized dynamically (i.e. at run-time) by the JVM. A Just-In-Time compiler (JIT)...

    Provided By University of Minnesota

  • White Papers // Apr 2009

    Tracking With Unreliable Node Sequences

    Tracking mobile targets using sensor networks is a challenging task because of the impacts of in-the-field factors such as environment noise, sensing irregularity, etc. This paper proposes a robust tracking framework using node sequences, an ordered list extracted from unreliable sensor readings. Instead of estimating each position point separately in...

    Provided By University of Minnesota

  • White Papers // Apr 2009

    Impact of Fading on the Performance of ALOHA and CSMA

    This paper considers the performance of the ALOHA and CSMA MAC protocols in wireless ad hoc networks in the presence of fading. Increasing the rate of successful reception of packets is the authors' objective, and thus, outage probability is used as the performance evaluation metric. In their network model, packets...

    Provided By University of Minnesota

  • White Papers // Apr 2009

    Employer Health Benefit Costs And Demand For Part-time Labor

    The link between rising employer costs for health insurance benefits and demand for part-time workers is investigated using non-public data from the Medical Expenditure Panel Survey-Insurance Component (MEPS-IC). The MEPS-IC is a nationally representative, annual establishment survey from the Agency for Healthcare Research and Quality (AHRQ). Pooling the establishment level...

    Provided By University of Minnesota

  • White Papers // Mar 2009

    Monetary Policy In India: Objectives, Reaction Function And Policy Effectiveness

    In the first part of this paper, the policy reaction functions of the Reserve Bank of India (RBI) have been modeled to see how policy stance decisions respond to the changes in the goal variables. In the second part, the transmission effects of RBI's policy stances on the goal variables...

    Provided By University of Minnesota

  • White Papers // Mar 2009

    Optimum Pilot Overhead in Wireless Communication: A Unified Treatment of Continuous and Block-Fading Channels

    The optimization of the pilot overhead in single-user wireless fading channels is investigated, and the dependence of this overhead on various system parameters of interest (e.g., fading rate, signal-to-noise ratio) is quantified. The achievable pilot-based spectral efficiency is expanded with respect to the fading rate about the no-fading point, which...

    Provided By University of Minnesota

  • White Papers // Jan 2005

    Fertility And Social Security

    The data show that an increase in government provided old-age pensions is strongly correlated with a reduction in fertility. What type of model is consistent with this finding? We explore this question using two models of fertility, the one by Barro and Becker (1989), and the one inspired by Caldwell...

    Provided By University of Minnesota

  • White Papers // Jun 2003

    The Effectiveness and Safety of Traffic and Non-Traffic Related Messages Presented on Changeable Message Signs (CMS)

    This report discusses two experiments investigating Changeable Message Signs (CMS). The objectives of this study were to determine whether or not CMS messages really work, whether or not CMS messages cause traffic slow-downs, the likely impact of CMS messages on traffic flow, and whether or not messages should be presented...

    Provided By University of Minnesota

  • White Papers // Jan 2003

    Negotiation, Supply Management, And Farm Income

    Negotiating and supply management are two important marketing tools for farmers to consider. The two strategies are commonly used in business. They work in different ways, however. To get a feeling for how they are different, consider a common experience we have all had, that of buying a car. Surely,...

    Provided By University of Minnesota

  • White Papers // Jan 2010

    Stochastic Cross-Layer Resource Allocation for Wireless Networks Using Orthogonal Access: Optimality and Delay Analysis

    Efficient design of wireless networks requires implementation of cross-layer algorithms that exploit channel state information. Capitalizing on convex optimization and stochastic approximation tools, this paper develops a stochastic algorithm that allocates resources at network, link, and physical layers so that a sum-utility of the average end-to-end rates is maximized. Focus...

    Provided By University of Minnesota

  • White Papers // May 2010

    Dynamic Resource Allocation for Network Aware Applications

    Network aware applications provide opportunities for adaptive resource allocations for both network resources and distributed hosting of critical applications. This paper proposes an Automatic Dynamic Resource Management (AutoDRM) architecture for efficiently managing shared resources in tactical network environments without human operator intervention. The AutoDRM architecture was developed to resolve the...

    Provided By University of Minnesota

  • White Papers // Feb 2011

    VIRO: A Scalable, Robust and Namespace Independent Virtual Id ROuting for Future Networks

    Today's Internet is increasingly strained to meet the demands and requirements of these Internet services and their users, such as scalability to accommodate the increasing number of network components and host devices, high availability, robustness, mobility and security. As the universal "Glue" that pieces together various heterogeneous physical networks, the...

    Provided By University of Minnesota

  • White Papers // Jan 2011

    A First Look at Inter-Data Center Traffic Characteristics Via Yahoo! Datasets

    Recent years have seen unprecedented growth in the data center driven technologies and services. Various organizations are now sourcing their computing to "Cloud-based" infrastructures. Therefore, large scale data centers and associated cloud services are developed and deployed by various organizations and service providers to store massive amounts of data, and...

    Provided By University of Minnesota

  • White Papers // Jun 2010

    From Traffic Matrix to Routing Matrix: PoP Level Traffic Characteristics for a Tier-1 ISP

    Traffic matrices play a pivotal role in the management of an ISP's network such as various levels of traffic engineering and capacity planning. However, it is unclear how the interaction between the internal traffic routing policies chosen by the ISPs and large-scale content providers, and the ongoing trend of "Cloud-computing"...

    Provided By University of Minnesota

  • White Papers // Mar 2010

    Exploring Link Correlation for Efficient Flooding in Wireless Sensor Networks

    Existing flooding algorithms have demonstrated their effectiveness in achieving communication efficiency and reliability in wireless sensor networks. However, further performance improvement has been hampered by the assumption of link independence, a design premise imposing the need for costly ACKnowledgements (ACKs) from every receiver. This paper presents Collective Flooding (CF), which...

    Provided By University of Minnesota

  • White Papers // Dec 2009

    Random Walks on Digraphs: A Theoretical Framework for Estimating Transmission Costs in Wireless Routing

    Due to the unique characteristics of wireless technologies and the dynamics in the environments (e.g., Mobility and interference) they operate in, wireless channels are known to be time-varying, unreliable, and asymmetric. Furthermore, wireless networks are often designed to support certain applications or missions, and deployed in specific environments. For these...

    Provided By University of Minnesota

  • White Papers // May 2010

    Safe Inter-Domain Routing Under Diverse Commercial Agreements

    Commercial agreements drive the routing policies used in today's Internet. The two most extensively studied commercial agreements are transit and peering; however, they are only two of many diverse and continuously evolving commercial agreements that ISPs enter into. So far, the only known practical safe and robust routing policy is...

    Provided By University of Minnesota

  • White Papers // Jul 2009

    IP-Geolocation Mapping for Involving Moderately-Connected Internet Regions

    Current IP-geolocation mapping schemes primarily take delay-measurement approach, and most of them are based on the assumption of a strong correlation between networking delay and geographical distance between the targeted client and the landmarks. In this paper, however, the authors investigate a large region of the Internet and find the...

    Provided By University of Minnesota

  • White Papers // Dec 2009

    Starling: Minimizing Communication Overhead in Virtualized Computing Platforms Using Decentralized Affinity-Aware Migration

    Virtualization is being widely used in large-scale computing environments, such as clouds, data centers, and grids, to provide application portability and facilitate resource multiplexing while retaining application isolation. In many existing virtualized platforms, it has been found that the network bandwidth often becomes the bottleneck resource, causing both high network...

    Provided By University of Minnesota

  • White Papers // Feb 2010

    DECOR: Distributed and Energy Efficient Collection of Raw Data in Sensor Networks

    In wireless sensor networks, collection of raw sensor data at a base station provides the flexibility to perform offline detailed analysis on the data which may not be possible with in network data aggregation. However, lossless data collection consumes considerable amount of energy for communication while sensors usually have limited...

    Provided By University of Minnesota

  • White Papers // Mar 2010

    TSF: Trajectory-Based Statistical Forwarding for Infrastructure-to-Vehicle Data Delivery in Vehicular Networks

    This paper considers the scenarios where Internet access points are sparsely deployed in road networks to provide individual vehicles with customized road condition information for the driving safety, such as holes and bumps along their trajectories. Due to the limited communication coverage, vehicular ad-hoc networks are used to support the...

    Provided By University of Minnesota

  • White Papers // Apr 2010

    Exploiting Spatio-Temporal Tradeoffs for Energy Efficient MapReduce in the Cloud

    MapReduce is a distributed computing paradigm that is being widely used for building large-scale data processing applications like content indexing, data mining and log file analysis. Offered in the cloud, users can construct their own virtualized MapReduce clusters using Virtual Machines (VMs) managed by the cloud service provider. However, to...

    Provided By University of Minnesota

  • White Papers // Apr 2010

    Data Mining Based Predictive Models for Overall Health Indices

    Having quantitative indices of overall health of citizens is essential to moving from ad hoc decisions to a systematic approach for public health maintenance, and for individual care. In recent months, for lack of an overall health indicator, policies for whom to vaccinate with the (Scarce) H1N1 flu vaccine in...

    Provided By University of Minnesota

  • White Papers // Oct 2010

    VEIL-Click: Creating Advanced Large-Scale Ethernet Networks

    VEIL (Virtual Ethernet Identifier Layer) is a novel concept for below IP networking. It addresses the scalability, efficiency and reliability challenges facing the traditional Ethernet, while retaining its simplicity. Furthermore, it provides a uniform (Below IP) convergence layer to support a large, dynamic and heterogeneous (Layer-2) network that is capable...

    Provided By University of Minnesota

  • White Papers // Aug 2009

    An Examination Of Quality Management In Support Functions Of Elementary And Secondary Education Using The Malcolm Baldrige National Quality Awards Criteria For Performance Excellence

    Student learning, the primary outcome of the education process, is another important measure of quality. Learning among elementary and secondary students is monitored at the national level through the achievement test known as the National Assessment of Educational Progress. Trend data suggests that achievement growth among students has stagnated despite...

    Provided By University of Minnesota

  • White Papers // Sep 2009

    Cash Flow Risk Ratio: An Aid To Marketing Decisions

    Financial risk differs from the business risks previously described in that it results from the way the firm's capital is obtained and financed. A producer may be subject to fluctuations in interest rates on borrowed capital, or face cash flow difficulties if there are insufficient funds to repay creditors. The...

    Provided By University of Minnesota

  • White Papers // Dec 2009

    Examining Return On Human Capital Investments In The Context Of Offshore IT Workers

    The rapid pace of technological innovation necessitates Information Technology (IT) services firms to continually invest in replenishing the skills of their key asset base, the human capital. Controlling for unobservable employee characteristics and possible selection bias, one find significant a positive impact of training on employee performance. An additional training...

    Provided By University of Minnesota

  • White Papers // Aug 2010

    Google Apps For The University Of Minnesota

    This paper is to describe the various services associated with Google Apps for the University of Minnesota that are administered by the Office of Information Technology (OIT), and identify related support resources. The University has entered into an agreement with Google to make applications within the Google Apps for Education...

    Provided By University of Minnesota

  • White Papers // Jul 2009

    Retail And Wholesale Market Power In Organic Foods

    The demand for organic fresh fruits and vegetable continues to grow at a rate far higher than the rest of the produce industry. The cost of meeting organic certification standards, however, has meant that supply has been slow to adjust. With limited supply, the authors hypothesize that organic suppliers enjoy...

    Provided By University of Minnesota

  • White Papers // May 2009

    Using Proxies to Accelerate Cloud Applications

    A rich cloud ecosystem is unfolding with clouds emerging to provide platforms and services of many shapes and sizes. The authors speculate that future network applications may wish to utilize and synthesize capabilities from multiple clouds. The problem is this may entail significant data communication that derives from the client-server...

    Provided By University of Minnesota

  • White Papers // May 2009

    Nebulas: Using Distributed Voluntary Resources to Build Clouds

    Current cloud services are deployed on well provisioned and centrally controlled infrastructures. However, there are several classes of services for which the current cloud model may not fit well: some do not need strong performance guarantees, the pricing may be too expensive for some, and some may be constrained by...

    Provided By University of Minnesota

  • White Papers // May 2009

    Virtual Putty: Reshaping the Physical Footprint of Virtual Machines

    Virtualization is a key technology underlying cloud computing platforms, where applications encapsulated within virtual machines are dynamically mapped onto a pool of physical servers. In this paper, the authors argue that cloud providers can significantly lower operational costs, and improve hosted application performance, by accounting for affinities and conflicts between...

    Provided By University of Minnesota

  • White Papers // Jan 2011

    Proxy-Assisted Periodic Broadcast for Video Streaming With Multiple Servers

    Large scale video streaming over Internet requires a large amount of resources such as server I/O bandwidth, network bandwidth. A number of video delivery techniques can be used to lower these requirements. Periodic broadcast by a central server combined with proxy caching offers a significant reduction of the aggregate network...

    Provided By University of Minnesota

  • White Papers // Jan 2011

    Proxy-Assisted Periodic Broadcast Architecture for Large-Scale Video Streaming

    Many multimedia applications rely on video streaming techniques. However, large scale video delivery is still challenging since it requires a large amount of resources. This paper proposes a proxy-assisted periodic broadcast architecture for video delivery to a large number of clients over the Internet. The video delivery technique is based...

    Provided By University of Minnesota

  • White Papers // Jan 2005

    Fertility And Social Security

    The data show that an increase in government provided old-age pensions is strongly correlated with a reduction in fertility. What type of model is consistent with this finding? We explore this question using two models of fertility, the one by Barro and Becker (1989), and the one inspired by Caldwell...

    Provided By University of Minnesota

  • White Papers // Jan 2003

    Negotiation, Supply Management, And Farm Income

    Negotiating and supply management are two important marketing tools for farmers to consider. The two strategies are commonly used in business. They work in different ways, however. To get a feeling for how they are different, consider a common experience we have all had, that of buying a car. Surely,...

    Provided By University of Minnesota

  • White Papers // Jan 2010

    Paradigms for Mobile Agent-Based Active Monitoring of Network Systems

    This paper presents here a framework together with a set of paradigms for mobile agent based active monitoring of network systems. In one's framework mobile agents are used to perform remote information filtering and control functions. Such agents can detect basic events or correlate existing events that are stored in...

    Provided By University of Minnesota

  • White Papers // Mar 2010

    Using SAS to Perform Individual Matching in Design of Case-Control Studies

    In the design of case-control studies it is often desired to match each case with one or more controls based on a set of variables and maximum differences between case and control in these variables. Case-control studies can arise within cohort studies where it is desired to compare subjects experiencing...

    Provided By University of Minnesota

  • White Papers // Mar 2010

    Choosing Management strategy

    The authors describe two structured decision-making methods-one using a hierarchy of goals and a second using ranking on the sum of the weighted criteria-that may be useful for many practical conversion problems particularly when advisory groups evaluate the output of simulation models. The authors illustrate both methods by applying them...

    Provided By University of Minnesota

  • White Papers // Sep 2009

    A Multi-Robot System for Unconfined Video-Conferencing

    Telepresence or tele-immersion technologies allow people to attend a shared meeting without being physically present in the same location. Commercial telepresence solutions available in the market today have significant drawbacks - they are very expensive, and confine people to the area covered by stationary cameras. This paper presents a mobile...

    Provided By University of Minnesota

  • White Papers // Oct 2009

    The Economic Impact of Wireless Number Portability

    This paper examines the price response of wireless carriers to the introduction of number portability. The authors find that wireless prices decreased in response to number portability, but not uniformly across plans. Average prices for the plans with the fewest minutes decreased by only $0.19/month (0.97%), but average prices for...

    Provided By University of Minnesota

  • White Papers // Jan 2010

    Sampling-Based Metadata Management for Flash Storage

    Existing garbage collection algorithms for the ash-based storage use score-based heuristics to select victim blocks for reclaiming free space and wear leveling. The score for a block is estimated using metadata information such as age, utilization, and erase count. To quickly find a victim block, these algorithms need to maintain...

    Provided By University of Minnesota

  • White Papers // Feb 2010

    Multi-Robot System for Unconfined Video-Conferencing

    Telepresence or tele-immersion technologies allow people to attend a shared meeting without being physically present in the same location. Commercial telepresence solutions available in the market today have significant drawbacks - they are very expensive, and confine people to the area covered by stationary cameras. This paper presents a mobile...

    Provided By University of Minnesota

  • White Papers // Dec 2009

    S-MED: Sarcoma MicroRNA Expression Database

    Human sarcomas are a heterogeneous group of over 50 different malignant tumors for which very few diagnostic markers currently exist. MicroRNA (miRNA) transcript levels have been proposed for use in the diagnosis, classification and prognosis of tumors. Over 700 miRNAs are identified in humans and miRNA are considered attractive candidates...

    Provided By University of Minnesota

  • White Papers // Dec 2009

    A Bluetooth Keyboard Attack

    Bluetooth devices have become increasingly popular and are expected to surpass two billion devices sold by 2010. Bluetooth provides communication between devices, such as cell phones and headsets, or computers and robots, among other things. Bluetooth keyboards and mice are also very popular, making people more mobile when working at...

    Provided By University of Minnesota

  • White Papers // Jan 2010

    PDIO: High-Performance Remote File I/O for Portals-Enabled Compute Nodes

    Portals Direct I/O ("PDIO") is a special purpose middleware infrastructure for writing data from compute processor memory on Portals-enabled compute nodes to remote agents anywhere on the WAN in real-time. The prototype implementation provided a means for aggregation of outgoing data through multiple load balanced routing daemons, end-to-end parallel data...

    Provided By University of Minnesota

  • White Papers // Apr 2010

    A Wireless Sensor Network Communication Model for Automation of Electric Power Distribution

    Automation of electric power distribution in a cost-efficient and reliable manner can be accomplished by complete automation of the load dispatch centers and substations on a large scale. For efficient load balancing among the feed lines, a continuous monitoring of parameters, such as voltage, current in the line, temperature, pressure,...

    Provided By University of Minnesota

  • White Papers // Jun 2003

    The Effectiveness and Safety of Traffic and Non-Traffic Related Messages Presented on Changeable Message Signs (CMS)

    This report discusses two experiments investigating Changeable Message Signs (CMS). The objectives of this study were to determine whether or not CMS messages really work, whether or not CMS messages cause traffic slow-downs, the likely impact of CMS messages on traffic flow, and whether or not messages should be presented...

    Provided By University of Minnesota